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Texas Instruments LM2105 Half-Bridge Gate Driver

Texas Instruments LM2105 Half-Bridge Gate Driver is a compact, high-voltage gate driver designed to drive both the high-side and the low-side N-channel MOSFETs in a synchronous buck or a half-bridge configuration. The integrated bootstrap diode saves board space and reduces system costs by eliminating the need for an external discrete diode.

The –1V DC and –19.5V transient negative voltage handling on the SH pin improve the system robustness in high noise applications. The small, thermally-enhanced 8-pin WSON package improves PCB layout by allowing the driver to be placed closer to the motor phases. The Texas Instruments LM2105 is also available in an 8-pin SOIC package compatible with industry-standard pinouts. Undervoltage lockout (UVLO) is provided on the low-side and the high-side power rails for protection during power up and down.

Features

Drives two N-channel MOSFETs in a half-bridge configuration
Integrated bootstrap diode
5V typical undervoltage lockout on GVDD
105V maximum recommended voltage on BST

–19.5V absolute maximum negative transient voltage handling on SH
0.5A/0.8A peak source/sink currents
115ns typical propagation delay

Applications

Brushless-DC (BLDC) motors
Permanent magnet synchronous motors (PMSM)
Cordless vacuum cleaners
Cordless garden and power tools

E-bikes and e-scooters
Battery test equipment
Offline uninterruptible power supply (UPS)
General-purpose MOSFET or IGBT driver

Texas Instruments LM2105 Half-Bridge Gate Driver

Features

Applications

Functional Block Diagram

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